Aeroacoustic source term filtering based on Helmholtz decomposition

@inproceedings{Schoder2017AeroacousticST,
  title={Aeroacoustic source term filtering based on Helmholtz decomposition},
  author={Stefan Schoder and Manfred Kaltenbacher},
  year={2017}
}
Hybrid aeroacoustic methods seek for computational efficiency and robust noise prediction. Using already existing aeroacoustic wave equations, we propose a general hybrid aeroacoustic method, based on compressible source data. The main differences to current state of the art aeroacoustic analogies are that an additional decomposition is used to compute the aeroacoustic source terms and their application is extended to the source formulation, based on compressible flow data. By applying the… 

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References

SHOWING 1-10 OF 23 REFERENCES

Perturbed Compressible Equations for Aeroacoustic Noise Prediction at Low Mach Numbers

A revised formulation of a hydrodynamic/acoustic splitting method is proposed for aeroacoustic noise prediction of wall-bounded shear flows at low Mach numbers. Based on the analysis of perturbed

Aeroacoustic tonal noise prediction of open cavity flows involving feedback

Abstract A new hydrodynamic/acoustic splitting method isemployed to predict aeroacoustic tonal noise of self-sustained oscillatory flows over the open cavity at low Mach numbers. Acoustic field is

Computation of Flow Noise Using Source Terms in Linearized Euler's Equations

An acoustic analogy using linearized Euler’ s equations (LEE) forced with aerodynamic source terms is investigated to computetheacousticfare eld. Thishybridmethod isappliedto

Modeling and Finite Element Formulation for Acoustic Problems Including Rotating Domains

A finite element formulation for the efficient numerical simulation of sound in computational domains, including rotating regions, is presented. The mathematical description is based on an arbitrary

On the generation of sound by supersonic turbulent shear layers

A theory is proposed to describe the generation of sound by turbulence at high Mach numbers. The problem is formulated most conveniently in terms of the fluctuating pressure, and a convected wave

On sound generated aerodynamically II. Turbulence as a source of sound

  • M. Lighthill
  • Physics
    Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1954
The theory of sound generated aerodynamically is extended by taking into account the statistical properties of turbulent airflows, from which the sound radiated (without the help of solid boundaries)

Computational Aeroacoustics for Rotating Systems with Application to an Axial Fan

A hybrid aeroacoustic formulation, which is well suited for the computation of rotating systems, is presented. It is based on a decomposition of flow (incompressible part) and acoustic (compressibl...

Computational Aeroacoustics for Low Mach Number Flows

This is the text of an introductory lecture intended to provoke discussion of some of the problems likely to face participants in the Workshop as they develop the subject of Computational